Mechanical movement



J. D. MOORE MECHANICAL MOVEMENT Apr. 3, 1923,

Filed Aug. 29, 1919 Patented Apr. 3, 1923.

JAMES DUDLEY MOORE,'OF NORTH WILKESBOBO, NORTH CAROLINA.

MECHANICAL MOVEMENT.

Application file'd August 29, 1919. Serial No. 320,719.

To all whom it may concern:

Be it known that 1, JAMES D. MOORE, a citizen of the United States,residing at North Wilkesboro, in the county of Wilkes and State of NorthCarolina, have invented certain new and useful Improvements inMechanical Movements, of which the follow ing is a full, clear, andexact specification.

This invention relates to mechanical movements, and more particularly toa mechanical movement for changing a rotary movement to an oscillatingmovement.

The invention has for its object to provide a mechanical movement for adrive 1 which will utilize a minimum amount of power for its operation,will automatically take up any wear. between the cooperating parts andwill operate quietly and efficiently.

The invention described in this specification has been devisedparticularly for operating cleaning screens or bolters of flour mills,and has been illustrated in connection with a flour mill, but it shouldbe distinctly understood that the invention is not limited to thisparticular use, but is of general application.

The invention comprises in the present embodiment a rotary drivingmember and a member resiliently held in a position adjacent the rotarymember for communicating the rotary motion of the driving member to theelements to be driven thereby. The rotary member is provided with afront surface which is inclined atan angle with respect-to a planeperpendicular to the shaft upon which the rotary member is mounted. Thisinclined surface is provided with a circular groove adapted to receive aset of balls. In view of the fact that the front surface of the drivingmember is inclined, as above described, the rotation of this member willcause the balls carried by the groove formed therein to movelongitudinally with respect to the driving shaft, thereby oscillatingthe second member, which is disposed adjacent the rotary member and in aposition to be engaged by the balls.

I have illustrated one embodiment of the invention in the accompanyingdrawings, and in these drawings Fig. 1 shows in perspective a flour millhaving my improved mechanical movement embodied therein;

Fig. 2 is an enlarged view showing in section the cooperating parts ofthe improved movement; and

Fig. 3 is a front elevational View, partly in section, showing the frontface of the rotililliltg member which is secured to the drive sia Theflour mill, in connection with which my invention'is illustrated,comprises a base 10 having a plurality of upright frame members 11 andsecured thereto the members 11 supporting a casing 12 in which ismounted the usual grinding mechanism. A hopper 13 is carried by thecasing 12, and is provided with a discharge chute 14: which empties intoan oscillatory screen 15. A discharge chute 16 conveys the ground mealfrom the grinding mechanism to a bolter 17 which is supported at itsfront end by a fiexible link 18 carried by a bracket 19 which in turn issecured to the casing 12. The uprights 11 are provided with bearings 20in which is supported a main drive shaft 21 for the grinding mechanism,this shaft also being utilized to oscillate the screen 15 and the bolter17. A drive pulley 21' is secured to the drive shaftand is driven by abelt in connection from any suitable source of power.

Referring now to Fig. 2, I will describe the construction of themechanical movement by means of which the screen 15 and bolter 17 areoscillated. A collar 22 is fixedly secured to the shaft 20 by means of aset screw 28, this collar being provided with an end surface 24: whichis disposed in a plane inclined at an angle with respect to a planepassing through the shaft 20 at right angles with respect to said shaft.From the showing in Fig. 2 it will be seen that the portion of thesurface 24: disposed above the shaft 20 is positioned in advance of theportion of the surface 24: disposed below the shaft 20. The surface 24has formed thereon a circular groove 25 which is formed concentric withthe axis of the shaft 20. A collar 26 is also carried by the shaft 20 ina position adjacent the collar 22, this collar being provided with atapered central opening 27 to permit the collar to be oscillated on theshaft 20. The collar 26 is also provided with oppositely extendingflanges 28 and 29, the flange 29 being formed on the outer periphery ofthe collar and overlapping a portion of the peripheral surface of thecollar 22. The spring 30 is interposed. between the collar 26 and thecasing 12, this spring being positioned at one end of the flange 23 andat its opposite end on a shoulder 31 formed on the inner bearing 20. Aplurality of balls 32 are positioned in the groove 25 formed in thecollar 22 and are held in this groove by means of the collar 26 which isforced toward the collar 22 by the spring 30.

The oscillating motion of the collar 26 is communicated to the screen 15and the bolter 17 in the following manner.

The screen is supported on the front end of a resilientstrap 33 whichextends downwardly from the screen and is secured to a member 3 1 whichin turn is pivoted at 35 to a bracket 36 secured to the casing 12. Thestrap 33 is extended below its connection to the pivot member 3a to aposition ad acent the outer surface of the collar 26, as shown at 37,and. is held in engagement with said surface by means of a spring whichis carried by a rod 39 which in turn is mounted on the casing 12. Thelower end 37 of the strap 33 is provided with a suitable aperturethrough which the rod 39 extends, the spring 38 being positioned betweenthe strap and the casing. In this manner the lower end 37 of the strapis constantly held in engagement with the outer surface of the collar26. The bolter 17 has pivoted thereto at 10 a lever ll which is pivotedat 4:2 to the frame of the mill, the inner end of the lever being heldin engagement with the outer surface of the collar 26 by means of aspring 43 carried by a rod 44: which is secured to the casing 12 andpasses through a suitable aperture formed in the lever ll, the springbeing positioned between the lever and the casing. In this manner theinner end of the lever is constantly held in contact with the outersurface of the collar 26.

Having described the construction of my improved mechanical movement Iwill now briefly outline the operation of the move ment.

As the shaft 20 is rotated by means of suit able power, the collar 22will also be rotated, and in view of the inclination of its frontsurface, will change this rotary movement to an oscillating movement ofthe collar 26. This movement of the collar 22 is commu' nicated to thecollar 26 by means of a plurality of balls 32 which are held in thegroove 25 formed in the collar 22 by means of a spring 30. Theoscillating movement of the collar 26 is communicated to the screen 15and bolter 17, respectively, through the strap or lever 33 and lever l1.

From the above description of the construction and operation of myimproved invention, it will be seen that I have provided a simple andeffective combination of coacting parts, and a construction which may beoperated with a minimum expenditure of power, and by means of which anywear between the coacting parts will be automatically compensated for.

While I have in the above specification described one embodiment whichmy invention may assume, it should be distinctly understood that theinvention is not limited to the specific construction illustrated, andthat modifications and changes in the construction and arrangement ofthe cooperating parts may be made without departing from the spirit andscope of the invention, as expressed in the following claims.

I claim:

1. In a mechanical movement, a rotatable driving member, an oscillatorycollar, said rotatable driving member having an inclined surface on oneend thereof facing said collar, and resilient means for maintaining saidoscillatory member in a position adjacent said rotatable member wherebythe movement of said rotatable member will be communicated to saidoscillatory collar.

2. In a mechanical movement, a driving member, a driven member, one ofsaid members being provided with an end surface inclined with respect toa. plane perpendicular to the axis of rotation of said member, aplurality of balls disposed between said members and resilient means formaintaining said other member in contact with said balls.

8. In a mechanical movement. a driving member, a driven member, one ofsaid members being provided with an end surface inclined with respect toa plane perpendicular to the axis of rotation of said member, saidsurface having a groove formed therein, a plurality of balls positionedin said groove and resilient means for maintaining said other member incontact with said balls.

In combination, a driving member having an end surface inclined withrespect to a plane perpendicular to the axis of rotation of said drivingmember, an oscillatory driven member disposed adjacent said drivingmember and having a peripheral flange overlapping saidj driving member.and resilient means for forcing said oscillatory member toward said.driving member.

In a mechanical movement, a shaft, a driving member secured thereto andhaving formed on one end thereof a surface inclined with respect to aplane perpendicular to the axis of rotation of said shaft, anoscillatory member having a central opening therein for the reception ofsaid shaft, and having a peripheral flange overlapping said drivingmember. and resilientmeans for forcing said oscillatory member in adirection toward said driving member.

ing member and positioned between said groove and said oscillatorymember.

7. In combination, an oscillatory collar, means for oscillating saidcollar, a plurality of operative elements, levers connected there- 15to, and resilient means for forcing said levers into contact with saidcollar.

In testimony whereof I afiix my signature.

JAMES DUDLEY MOORE.

